Cargo-hatches



E. E. VON TELL CARGO-HATCHES Feb. 5, 1957 2 Shets-Sheet 1 Filed Nov. 9,1953 E. E. VON TELL CARGO-HATCHES 2 Sheets- 2 Feb.

Filed No 1953 United States Patent CARGO-HATCHES Edward Elias von Tell,Goteborg, Sweden Application'November 9, 1953, Serial No. 391,011 Claimspriority, application Sweden November 28 '1952 i 2 Claims. (Cl. ru -202iThe present invention refers to cargo-hatches of the type comprising atleast three sections pivotally connected to one another, one of the twooutermost of thesesections being pivotally connected to the frame of thehatch, while the adjacent section is adapted at the opening of the hatchto be lowered with the lower side thereof against the lower side of thefirst-mentioned section connected to the frame. At the opening of ahatch of this type one would hitherto proceed so that the second one ofthe two outermost of three sections, for example, would be sprungsubstantially through 180 to be caused to bear with its upper sideagainst the upper side of the intermediate section, whereupon all of thethree sections would be raised into a substantially vertical position.Particularly where relatively large sections are brought intoconsideration, it might be found troublesome to undertake the swingingof the outermost section through 180, because after a raising movementthrough 90 a critical position will be reached, at which the wincheshave to be operated with a certain cautiousness.

The cargo-hatch according to the invention is principally distinguishedby means for raising the other section or sections connected to the twofirst-mentioned sections from the frame to facilitate displacement ofsaid section (sections) along the frame in a substantially loweredposition.

The invention will be explained in the following with reference to theaccompanying drawings, wherein Figs. 1 and 2 show a hatch constructedaccording to the invention in two different positions during the openingof the hatch, while Fig. 3 is a section through the border portion of ahatch with its frame constructed in accordance with the invention. Fig.4 shows certain details of the hatch according to Figs. 1 and 2 inelevation.

In Figs. 1 and 2, 1 designates the frame of a trisected hatch, the threesections of which are designated by 2,

3 and 4, respectively. Of these sections, section 2 is pivotallyconnected to one end of the frame by means of a hinge 5, and the pivotpin between the sections 2 and 3 is denoted by 6. The section 4 ispivotally connected to the section 3 by means of a pivot pin 7.

Guide rails 8 extend along the sides of the frame 1 and cooperate withsupporting members 9 and 10, the configuration of which is best shown inFig. 4. The latter figure shows certain portions of the sections 3 and 4in elevation, when the hatch is in its completely lowered position. Inthis position the supporting member 9 projects down into a recess 11 inthe guide rail 8, while the rounded end of the supporting member 10,which is secured to the section 3 and projects past the pivot pin 7,projects down into another recess 12 in the guide rail. Provided on thelatter isa wedge-like cam member 13, whichis displaceable and adapted tobe locked in different positions for a purpose to be set forth in thefollowing.

Fig. 3 shows a section through a hatchand the frame thereof. As willappear from this figure, a packing 14 is provided on the lower side ofeach hatch section, said packing being preferably made from rubber orthe like.

; manner that the packing.14 .is raised from the frame 1,

when the sections 2, S are loweredvin the manner shown r ice When thehatch is in its lowered position, the packing is pressed against theupper side of the frame 1 with the aid of bolts 15, and for this reasonthe supporting members 9 and 10 must have facilities for moving somewhatin a vertical direction. When the hatch is to be removed, the bolts 15are loosened, while the members 9 and 10 still project somewhatdownwardly into their recesses. Before the raising operation iscommenced, the cam 13 is caused to bear on the supporting member 10, andit is readily.

understood that the pivot pin 7 will be raised in such in Fig.1. Atthesame'tiine a displacement of section 4 takes place toward the hinge5, the supporting member 9 then sliding up onto the guide rail 8. Inthis manner section 4 will slide along the frame 1 in a substantiallyhorizontal position, but with the packing 14 raised'from the frame.

Figs. 1 and 2 show a winch 17 arranged on a mast house or the like 16,the rope 18 of said winch being extended over a guide roller 19 providedon a mast 20. Secured to the pivot pin 6 is a block 21, through whichthe rope 18 passes in order then to extend further through a block 22,which is arranged on the mast 20 above the guide roller 19. The free endof the rope 18 is secured by means of a hook 23 to the free border ofsection 4.

The method in opening the hatch should be readily understood from thetwo Figures 1 and 2. As soon as the pivot pin 6 commences to rise,section 4 is raised according to the description hereinbefore, saidsection then sliding along the frame 1, until sections 2 and 3 take theposition shown in Fig. 2, when a continued pull in the rope 18 causes anupward swing of section 4 toward the two remaining sections. By reasonof the fact that the rope 13 is also secured to section 4, the pressureof this section on the guide rail 8 will be considerably reduced,whereby the friction between the supporting member 9 and the guide rail8 will diminish. In dependence on the weight of the various sections andso forth it may be found suitable under certain circumstances to securethe hook 23 by a distance inwardly of section 4, so that the latter doesnot take oif entirely from the guide rail 8, whereby the operation ofopening the hatch would be interfered with.

In the example shown, special means are provided for the operation ofthe hatch, but the same may obviously also be operated, for instance, bymeans of one of the cargo spars of the ship. If desired, it is possibleto make use of two supporting members on section 4, said members beingsubstantially of the same type as the supporting member 9, thesupporting member 10 being then excluded. It is also readily understoodthat substantially the same advantages will be obtained, if a furthersection is added to section 4, said further section then obviously alsohaving to be provided with supporting members.

As will be seen from Fig. 4, the supporting member 9 is of a lengthgreater than that of the recess 12, for which reason the supportingmember 9 easily passes over the recess in consideration without fallingdown into the same.

As indicated above, the invention can be modified in its details wtihinthe scope of the following claims. Thus the guide rails and thesupporting members may be placed inside the frame without anydisadvantage should such location be found suitable. Furthermodifications are also conceivable without having to be mentioned inthis andthird sections for "lifting said third section from the frameandimparalle'lto the"sarneduring 'the"m'oveme'nt" secondsect-iompast thehinge? between the second and third sections anda projectionatfthe*free.'end fof'thethi'rd section, and-guide=railsj extending alongthe'fra'me and havingrecesses to-receive said supporting members in theclosed 'position -of the cover, said supportingfrnembers' having slidingsurfaces to cooperate withsaid guide rails, the sliding. surface of thearm'on'the second section being cu rved',and"the slidingf surfaceof"'the"pi'ojection on the third section'being straight.

2; The combination set forth in'jclaim' 1" and "wherein the recess forthe supporting 'member on theisecond" sec tion' is'shorter than thesliding surface of the projection on the third section, whereby topermit said projection said last-named recess withol it falling downtherein.

References Cited in the file of this patent UNITED STATES PATENTS1,158,946 McGray Nov. 2, 1915 1,904,735 Isherwood-et a1. Apr. 8, 19332,256,087 Hay Sept. 16, 1941 2,656,810 Jernstr'om- Oct: 27, 1953 FOREIGNPATENTS 667,464. Great-Britain- Mar: 5,1952- 816,206 Germany Oct. 8,1951 836,608 Germany' Apr. 15, 1952

